Hand drilling-sviachine



Patented Sept. 13, I898.

. B. F. SMITH. HAND DRILLING MACHINE.

(Application filed Feb. 21, 18.98.)

(No Model.)

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BENJAMIN F. SMITH, OF SOMERVILLE, MASSACHUSETTS.

HAND DRILLING WIACHINE.

SPECIFICATION forming part of Letters Patent No. 610,773, datedSeptember 13 1898.

Application filed February 21,1898. Serial No. 671,054. [No model.)

This invention relates to improvements in hand drilling devices, and itis carried out as follows, reference being had to the accompanyingdrawings, wherein Figure 1 represents a top plan view of a hand drillingor nut-turnin g tool to which my attachment is applicable.

a side view of Fig. 1. Fig. 3 represents a detail side elevation of thedetachable handle which I use in connection with said .hand drilling ornut-turning tool. Fig. 4; represents a central vertical section of thehand drilling or nut-turning tool, showing the detachable handle inposition for use. Fig. 5 represents a horizontal section on the line 5 5shown in Fig. 4, and Fig. 6 represents a central longitudinal section ofthe sleeve and feed-screw which I use in connection with the handdrilling device.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

In the drawings, A. represents the cam-ring of a hand drilling ornut-turnin g device, having internal cam-shaped recesses a a a,adaptedto receive and interlock with rollers 12 b I), located in recesses Z) Z)Z) on the ring or follower B as used in friction drill devices.

To the cam-ring A is adjustably secured the lever 0, provided at itsinner end with a crank 0, adapted to enter a recess b in the ring 13,and by turning said lever the ring B may be turned to the right or left,as maybe desired, for the purpose of turning the drill or its equivalenttool to the right or left, as circumstances may require. Within the ringor follower B and in contact with the rollers b b b is arranged the bodyor drill-holder D, having a central tapering, square, or polygonalrecess (Z for receiving the shank of the socket-wrench or drill E, as iscommon in de vices of this kind.

I wish to state that I do not claim in this application any particularhand drilling or Fig. 2 represents nut-turnin g device, as my inventionis applicable to any well-known construction of such devices,and I haveonly shown in the drawings one form of such hand drilling device, butwish to state that my attachment is equally well adapted to other formsof hand drilling devices.

In one piece with the lower portion of the body or drill-holder D ismade a flange or stop-collar D, as iscominon in devices of this kind.

Above the cam-ring A is secured a flange or collar F for the purpose ofholding said drill-holder D from being detached while in use from thesaid cam-ring A in the usual manner. In connection with said handdrilling device I use a handle preferably composed of a lower portion G,to which is pivotally connected the pressure-cap G, adapted to beheld bythe operator in holding'the socketwrench in position on a nut,lag-screw, dad, or for boring purposes when the lever O is 0s cillated.The handle portion G is provided with a cylindrical shank g, adapted tofit into a oorrespondingly-shaped cylindrical recess din the body ordrill-holder,D,and said shank is provided with an annular groove 9,

adapted to receive the spring-pressed locking-pin h, which is secured toa spring-ring II and works in a perforation in the detachable collar Fand upper end of the body D, as shown. The lower portion 9' of thehandleshank gis made square or polygonal, so as to fit into acorrespondingly-shaped recess d in the interior of the body D, as shownin Figs. 1, 3, and 4.. The lower portion of the cylindrical shank g ismade tapering, as shown at g in Fig. 3, so as to facilitate theinsertion of said shank in the body 1) and causes it to readilyinterlockwith the spring-pressed pin it no matter in what position said shank isplaced in the perforation in said body D.

When the hand drilling device is used for drilling holes in metal, I usein connection with it a sleeve K and feed-screw K, withinternally-screw-threaded spindle K of the usual kind, as shown in Fig.6, and when used in connection with a hand drilling device having aperforated body or drill-holder, as described, I provide the lower endof said spindle K with a cylindrical shank 70, having an annular grooveis, tapering surface 7c ,and

lower square end 70', corresponding in shape and size to the shank onthe handle G, so as to make such sleeve and feed-screw interchangeablewith the handle as occasion may require.

What I Wish to secure by Letters Patent and claim is- In a hand drillingor nut-turning device, the combination with the tool-holder and a leverjournaled about said tool-holder and operating to turn the tool-holderin one direction, said tool-holder havinga cylindrical recess in itsupper end, an angular recess below the cylindrical recess and aninclined annular shoulder between said recesses, of a removable handlehaving a cylindrical shank corresponding to the cylindrical recess, a

BENJAMIN F. SMITH.

Witnesses:

ALBAN ANDREN, LAURITZ N. MOLLER.

